Results 61 to 70 of about 278,215 (318)

Role of unsaturated permeability function in seepage analyses

open access: yes, 2022
Unsaturated permeability function is the key parameter in seepage analyses. The unsaturated permeability function is often estimated from soil-water characteristic curve (SWCC) by means of estimation models. However, different estimation models result in
Leong, EC   +2 more
core  

Solvent‐Free Thermal Defect Engineering in Molecular Frameworks With Volatile Linkers

open access: yesAdvanced Materials, EarlyView.
Thermal removal of neutral volatile linkers enables precise and solvent‐free generation of metal vacancies in MOFs. This strategy affords redox‐stable, coordinatively unsaturated FeII sites with tunable spin, ligand coordination, and catalytic behavior. The approach offers a general route to design defect‐functional materials through local coordination
Sonia Martínez‐Giménez   +9 more
wiley   +1 more source

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

open access: yesAdvanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo   +6 more
wiley   +1 more source

Stresses in Saturated and Unsaturated Subgrade Layer Induced by Railway Track Vibration

open access: yesInfrastructures
The theoretical and practical studies of the cyclic loads resulting from the movement and passage of trains on the unsaturated subgrade to determine the effect of the degree of saturation and moisture content on the foundations and infrastructure of the ...
Mohammed Y. Fattah   +2 more
doaj   +1 more source

A Cu‐Based Near‐IR Active MOF with an Ion‐Pair Guest Exhibiting Versatile and Selective Gas‐Solid Reactivity

open access: yesAdvanced Materials, EarlyView.
The new Cu‐containing MOF (Me2NH2)(CuICl2)@[Cu4(INA)4Cl2O]·1.5dmf (3) contains a cation and an anion as guests and shows UV‐near‐mid‐IR absorption and near‐IR emission. MOF 3 shows gas‐solid reactivity in the presence of NH3 and HCOOH to yield two new 3D MOF.
Rajat Saha   +10 more
wiley   +1 more source

Synthesis of an unsaturated diether analogue of phosphatidyl ethanolamine

open access: yesJournal of Lipid Research, 1966
A synthesis of racemic diether analogues of glyceryl phosphatides is reported which is applicable to unsaturated aliphatic substituents. The ``oleyl'' diether analogue of phosphatidyl ethanolamine has been synthesized.
Paul J. Thomas, John H. Law
doaj   +1 more source

Unsaturated fatty acids [PDF]

open access: yes, 2016
Fatty acids are long-chain hydrocarbons. They are called unsaturated fatty acids when they lack the maximum possible number of hydrogen atoms attached to every carbon atom. For example, if stearic acid, which has 18 carbon atoms and frequently occurs in animal and plant fats, is missing 2 hydrogen atoms, then a double bond is present and the resulting ...
openaire   +1 more source

Effect of fibre treatments on interfacial shear strength of hemp fibre reinforced polylactide and unsaturated polyester composites

open access: yes, 2011
Surface treatment of hemp fibres was investigated as a means of improving interfacial shear strength (IFSS) of hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Fibres were treated with sodium hydroxide, acetic anhydride,
Alan Fernyhough   +5 more
core   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

open access: yesAdvanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria   +6 more
wiley   +1 more source

Laboratory experiments and dual‐domain modeling of infiltration dynamics in partially saturated fractured porous media

open access: yesVadose Zone Journal, 2022
Many studies have shown that fracture networks can provide rapid pathways for water infiltration and time‐dependent recharge in the vadose zone of consolidated fractured rock formations. To investigate the control of fracture networks and fracture–matrix
Florian Rüdiger   +3 more
doaj   +1 more source

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